Benefit Plans Level 4 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation	$ 125
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	37	51
Defined Benefit Plan, Interest Cost	523	609
Defined Benefit Plan, Expected Return on Plan Assets	(834)	(821)
Defined Benefit Plan, Amortization of Gains (Losses)	333	267
Defined Benefit Plan, Curtailments	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	59	106
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	20	127
Defined Benefit Plan, Interest Cost	18	74
Defined Benefit Plan, Expected Return on Plan Assets	(24)	(75)
Defined Benefit Plan, Amortization of Gains (Losses)	0	0
Defined Benefit Plan, Curtailments	(125)	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	(111)	126
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	0	0
Defined Benefit Plan, Interest Cost	217	248
Defined Benefit Plan, Expected Return on Plan Assets	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	181	106
Defined Benefit Plan, Curtailments	0	0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(816)	(816)
Defined Benefit Plan, Net Periodic Benefit Cost	$ (418)	$ (462)